Schedule Types
- 09 Aug 2024
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Schedule Types
- Updated on 09 Aug 2024
- 2 Minutes to read
- Contributors
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- PDF
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The table below summarizes the Schedule types.
Schedule types in IMS.
Schedule Type | Description | Relevant for whom | Default Interval | Can be Recurring? | Can be user created? | Can Schedule by Event? | Where to Credit? | Create on inactive Equipment |
|---|---|---|---|---|---|---|---|---|
Default | PEI | 12 months | NA | No | No | Create new Schedule | No | |
Internal / External with Scope and Plan Codes (for PLSS - ILI run, collect CP data ) | PEI, PLSS, FMA, TAT, FCM | Depends on default settings | Yes | Yes | Yes | ECH | Schedule Driver = IDLE IN PLACE, EXTERNAL or JURISDICTION | |
Thickness Measurements | PEI | Depends on default settings | Yes | No | Yes | Calc Summary (Circuit) | No | |
A repair. A once-off activity. | PEI, PLSS, FMA, TAT | - | No | Yes | Yes | ECH | Only for inactive idle in place Equipment | |
Scheduled RBI Re-Assessment | PEI | - | Yes | Yes | Yes | ECH | No | |
| Assessment | Scheduled PLSS Assessment (RBA assessment, internal corrosion assessment, …) | PLSS | - | Yes | Yes | Yes | ECH | No |
| PREVENTIVE | Preventive Maintenance (for PLSS - cleaning pigging, hydrotest, …) | RCM, PLSS, FCM | - | Yes | Yes | Yes | ECH | Schedule Driver = IDLE IN PLACE, EXTERNAL or JURISDICTION |
| CORRECTIVE | Corrective Maintenance (similar to the PEI CAIR Schedule). A once-off activity. | RCM, SIS, FCM | - | No | Yes | Yes | ECH | Only for inactive idle in place Equipment |
| Test | To scheduled SIF Tests. | SIS | - | Yes | Yes | Yes | ECH | Schedule Driver = IDLE IN PLACE, EXTERNAL or JURISDICTION |
The Schedules are normally created on Equipment level. Only in the case of RCM and SIS, it can alternatively also be created on FLOC level.
PEI Schedule Types
Schedules are defined on Equipment level. A Corrosion Schedule is automatically created with a Circuit and is therefore linked to the Equipment via the Circuit. The Default Schedule is not credited. All other Schedules are credited with an Equipment Condition History (ECH), except for the Corrosion Schedule which is credited in the Circuit.
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Schedules are created at two levels of the hierarchy: Equipment and Circuits.
Default Schedule
Default Schedules are created automatically every time a new piece of Equipment is added, or a qualifying schedule is not active. They will also be deactivated as soon as an active qualifying Schedule is added to this Equipment. Qualifying Schedules are: Inspection Schedule and RBI Re-Assessment Schedule. It acts as a “safety net” with a minimal time interval.
Inspection Schedule
Inspection Schedules are typically external visual inspections or internal inspections and specify the scope required including Non-Destructive Examination (NDE) techniques. Inspection Schedules are defined in terms of a Scope (Component-Degradation Mechanism (DM) combinations) and Plan Codes (checklists). These Schedules can be linked to Planned Event (Pitstop, Turnaround, …).
The Next Inspection Date (NID) can be determined by legal requirements, RBI, recommended inspection, or a default interval. An Inspection Schedule is usually recurring.
Inspection Schedules can be created manually or automatically by IMS (for recurring Schedules once a Schedule is credited by an ECH).
Corrosion Schedule
A Corrosion Schedule is registered for the corrosion Circuit, which is the place where CMLS/MPs are being monitored for internal corrosion on a piece of Equipment or piping, and the NDE thickness is entered in the database.
Corrosion Schedules are created automatically every time a new Circuit is added. Each active Circuit requires an active Corrosion Schedule. These Schedules are automatically recurring.
CAIR
Corrective Action Inspection Recommendation (CAIRs) are created for one-time repairs (due date for action). They are normally based on Inspection maintenance recommendation. CAIRs are also defined in terms of a Scope (Component-DM combinations) and Plan Codes (checklists). They cannot be recurring.
Normally, during an inspection, the user discovers issues that need to be repaired. When he is writing the ECH he can then directly create the CAIR Schedule. The NID is determined manually.
RBI Re-Assessment
An RBI Re-Assessment is performed by a group of people in a workshop on the Components of an Equipment. The RBI module in IMS is used to assess the DMs and Criticality & Confidence per Equipment-Component-DM. Based on the Criticality of the Components an RBI Re-Assessment is Scheduled each 4-6 years, so it is usually recurring.
Also, in case there is something found, that has not been considered in an RBI-Assessment, a Scheduled review for the corrosion engineer can be created with this type of Schedule.
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